FORMULIERUNG UND TABLETTEN MIT GUAIFENESIN MIT VERZÖGERTER FREISETZUNG

The invention relates to a modified release pharmaceutical product having two portions, wherein a first portion comprises a first quantity of guaifenesin and a first pharmaceutical additive in an immediate release formulation, wherein the first quantity of guaifenesin becomes fully bioavailable in the subject's stomach, and a second portion comprises a second quantity of guaifenesin and a second pharmaceutical additive in a sustained release formulation, wherein the ratio of said first quantity to said second quantity provides a C max in a human subject equivalent to the C max obtained when the first of three doses of a standard immediate release formulation having one third of a total amount of guaifenesin in the modified release product is dosed every four hours over a 12 hour period, wherein said product also provides therapeutically effective bioavailability for at least twelve hours after a single dose in a human subject according to serum analysis, and wherein the total amount of guaifenesin in the modified release product is from 600 mg to 1200 mg.